Login as grid owner
Set the enviornment for ASM instance as below
$ . oraenv —> when it ask for sid give the ASM instance name
$ srvctl config scan
SCAN name: scan-cluster.wysheid, Network:1/10.17.57.0/255.255.255.0/
SCAN VIP name: scan1, IP: /scan-cluster.wysheid/10.17.57.160
SCAN VIP name: scan2, IP: /scan-cluster.wysheid/10.17.57.161
SCAN VIP name: scan3, IP: /scan-cluster.wysheid/10.17.57.162